THE CODLING MOTH IN MICHIGAN. 



43 



Table XLIII. — Length of incubation of the first brood of eggs and average mean tempera- 

 ture during incubation, Douglas, Mich., 1911. 



Date- 



Depos- 

 ited. 



May 28 

 May 30 

 June 

 June 

 June 

 June 

 June 

 June 

 June 

 ...do.... 

 June 10 

 ...do.... 

 June 11 

 ...do.... 

 June 12 

 ...do.... 

 June 13 

 June 11 

 ...do.... 

 June 15 

 ...do.... 

 June 16 

 ..do.... 

 June Is 

 June 19 

 June 20 

 ...do..... 

 June 21 

 June 22 

 June 24 

 June 26 

 ...do.... 

 June 27 

 June 28 

 June 29 

 Julv 2 



Red 



ring. 



June 1 



June 3 



June 4 



June 7 



June 6 



June 8 



Black 



spot. 



Tune "i 

 June 8 



..do 



June II 

 June lo 



June 11 

 June 12 

 ..<l.i.... 

 June 13 



.do.... 

 June 14 

 ...do.... 

 June 15 

 ..do.... 

 June 16 

 June is 



.do.... 

 June 19 



.do. 

 June 20 



.do.... 

 June 21 

 June 22 

 ..do.... 

 ..do.... 

 June 24 

 June 25 

 June 27 

 June 29 

 ..do.... 



June 15 



June lii 

 ...do 



July 



July 



July 4 



June 18 



.do 



June 19 



...do 



June 20 

 June 21 



..do 



..do 



...do 



June 22 



..do 



June 23 

 June 24 



..do 



June 2.5 

 June 26 

 June 27 

 June 30 

 July 1 



..do 



Julv 3 



..do 



Julv 4 

 Julv 5 



Hatched. 



June 

 June 

 June 

 June 

 June 

 June 

 June 

 June 

 ...do. 

 June 

 June 

 June 

 ..do 

 June 



.do. 

 June 



.do. 

 ..do. 

 June 



.do. 

 June 

 June 

 June 

 ..do. 

 June 

 June 

 June 

 June 

 June 

 July 

 July 

 July 

 Julv 

 ..do. 

 Julv 

 July 



Duration of— 



Red 

 ring. 



Days 



4 

 4 

 3 

 3 

 3 

 3 



Black 

 spol . 



Incu- 

 ba- 

 tion. 



Days. 



s 

 9 



7 



Days. 



10 

 10 



Average 

 mean 



temper- 

 ature. 



F.° 



64.27 

 64.21 

 65. 79 



67.78 

 67.87 

 66.38 

 65.07 

 65.27 

 65.30 

 64.96 

 63.68 



61. 12 



62. 93 



63. 58 

 63.29 



63.97 

 61. 50 

 65.21 



uu. 55 



67. IS 

 68 30 

 67. 73 

 68.93 



70.95 



72. 10 



73. OS 



72. 52 



73. 67 

 73.42 

 69.15 

 70.07 

 71.61 

 72.51 

 7:i. 16 

 76. 96 

 S2.S0 



Table XLIV. — Incubation periods of first-brood eggs; summary of Tabic XLIII. 



35215°— Bull. 115, pt 1—12- 



